xml转labelme的json

将XML文件转换为LabelMe的JSON文件可以使用以下步骤：

1. 安装Python的xmltodict和json模块，可以使用以下命令进行安装：

pip install xmltodict
pip install json

2. 读取XML文件并将其转换为字典格式：

import xmltodict

with open('example.xml') as xml_file:
    data_dict = xmltodict.parse(xml_file.read())

3. 从字典中提取有用的信息并将其转换为LabelMe的JSON格式：

import json

# 从字典中提取有用的信息
image_name = data_dict['annotation']['filename']
image_height = int(data_dict['annotation']['size']['height'])
image_width = int(data_dict['annotation']['size']['width'])

shapes = []
for obj in data_dict['annotation']['object']:
    label = obj['name']
    xmin = int(obj['bndbox']['xmin'])
    ymin = int(obj['bndbox']['ymin'])
    xmax = int(obj['bndbox']['xmax'])
    ymax = int(obj['bndbox']['ymax'])
    points = [[xmin, ymin], [xmax, ymin], [xmax, ymax], [xmin, ymax]]

    shape = {
        "label": label,
        "points": points,
        "group_id": None,
        "shape_type": "polygon",
        "flags": {}
    }
    shapes.append(shape)

# 将信息转换为LabelMe的JSON格式
labelme_data = {
    "version": "4.5.6",
    "flags": {},
    "shapes": shapes,
    "imagePath": image_name,
    "imageData": None,
    "imageHeight": image_height,
    "imageWidth": image_width
}

# 将JSON数据写入文件
with open('example.json', 'w') as json_file:
    json.dump(labelme_data, json_file)

这将生成一个名为“example.json”的LabelMe JSON文件，其中包含从XML文件中提取的有用信息。